Experiment in Business.

I have been studying on the markeitng and wanted to introduce mathematical orientation for the original four marketing mix. As you know, nowadays there have been 7Ps and 9P, this has created a confusion on my research and I have decided to maintain my study on the four markting mix namely the product, price, promotion and place. so I want to know how leaving these other marketing mix behind will have effect on my research. in addition, I am not mathematician and I want to introduce mathematical formula which small business people can use to calculate to find the optimal mixture of the four ps where they can earn more profits and compete strongly with others.